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TMDLs and Implementation Plan: Greater Trinity Region

The TMDL and its I-Plan are the road maps for activities to keeping the river segment safe for recreation.
fishing at Lower West Oakland LakeTrinity River Segment 0841 at Collins Streetheron on the Trinity River

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Project Location and ParametersGreater Trinity Project NavigationTMDL Program Navigation
Watershed Counties: Dallas, Tarrant
Parameter: Bacteria
River Basin: Trinity
Segments: 0805, 0822A, 0822B, 0841, 0841B, 0841C, 0841E, 0841G, 0841H, 0841J, 0841L, 0841M, 0841R, 0841T, 0841U

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Status and Activities

Reports and Other Documents

TMDL Projects


Approved I-Plan

On December 11, 2013, the commission approved the I-Plan developed by the stakeholders.

By resolution in June 2015, the stakeholder Coordination Committee added four tributary segments (0841F, 0841K, 0841N, and 0841V) of Mountain Creek Lake to this project. These segments and their TMDLs will be incorporated into the I-Plan after the TMDLs are adopted.

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Adopted TMDLs

On the date of their approval by the Environmental Protection Agency (EPA), all these TMDLs become part of the state’s Water Quality Management Plan.

Cottonwood Branch and Grapevine Creek

On September 21, 2011, the TCEQ adopted the TMDLs for Cottonwood Branch and Grapevine Creek. The EPA approved them on May 30, 2012.

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Lower West Fork Trinity River

On September 24, 2013, the TCEQ adopted these TMDLs. The EPA approved them on November 7, 2013.

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Upper Trinity River

On May 11, 2011, the TCEQ adopted these TMDLs for the Upper Trinity River. The EPA approved them on August 3, 2011.

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Contact Us

Please e-mail us at, and mention the Greater Trinity River plan in the subject line. Or call us at 512-239-6682.

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communities working together taking care of our rivers, lakes, and bays